Insulator.



No. 813,353. V PATENTED FEB. 20, 1906. A H. B. GROUSE.

INSULATOR. APPLICATION FILED APR.18. 1904.

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. UNITED STATES PATENT OFFICE.

HUNTINGTON B. CROUSE, F SYRACUSE, NE YORK.

INSULATOR. 2

To all whom it may concern:

= supporting tive view of my improved insulator.

Beit known that I, HUNTINGTON B. CRoUsE, of'Syracuse, in the county of Ononda a, in the State of New York, have invente new and useful Improvements in Insulators, of which the following, taken in connection with the accompanying drawings, is a full clear, and exact description.

This invention relates to improvements in insulators, and 1s particularly useful in con- I nection with switchboards for receiving and ,imetal sockets for fuselugs, lamps, an similar devices which are a a ted to be removably secured in thrrnetal soc ets for closing the electrical circuit throughthe fuse-wire or lam 4 The object o my present invention is to inclose and protect the metal socket from contact with external or foreign ob'ects which might injure the socket or esta lish any short circuits between the terminals of the power-circuit.

Another objectis to enable the socket to be secured to' the switchboard or base by the same means which secures one of the terminals of the power-circuit to the metal socket.

Other objects and uses will appear in the following description.

In the drawings, Fi ure 1 is a sectional view taken on line 1 1, 2, showing a fuseplug in place. Fig. 2 is a top plan of my improved socket, s owing it as operatively mounted u on and connected to a suitable .switchboar or base and the terminals of an electric circuit, the fuse-plug being removed.

3 is a transverse sectional view taken on' line 3 3, Fig. 2. Fig. 4 is an inverted perispecis a transverse vertical section through the same, showing one of the terminals in dotted lines as being removed or inserted through an opening in the base of the insulator. Fig. 6 is an inverted erspective view oithreadetached metal sociz my improved insulator. Fig. is'a perspective view of one of the terminals which is adapted to be electrically connected. to the socket and engages the base of the insulator,

whereby the same means which secures the terminal to the metal socket also holds'the insulator in place.

Similar reference characters indicate corresponding parts inallthe views.

' In carrying out the objects stated I pro-' vide a base 1 of insulating.materiaL-upon' 1w'hichis mounted a pair -of terminals 2 and. 3

Specification of Letters Patent. Application filed April 18, 1994. Serial No. 203,732.

of the base 1 and is of subs et used in connection with Patented Feb. 20, 1906.

of an electric power-circuit, said terminals. being secured to the base 1 by suitable fastening means, as screws 4,- and binding posts or nuts 5. The terminals 2 and 3 extend toward each-other from their fastening means '4, and the inner end of the terminal 2 is also secured to the base by a suitable fastening device, as ascreW 6. These terminals each consist of thin cop er bars or plates of sui-t' able width to lie at upon the base 1, and upon the'inner end of the terminal 2 is secured a metal boss or contact-piece 7, which is held in place by the fastening-screw 6, as

seen in Figs. 1 and 3. Mounted upon the base 1, so as to inclose the inner ad'acent ends of the terminals 2 and 3,is a cupsf1apedinsu-- lator 8, having its bottom resting directly upon the same face of the base to which the terminals 2 and 3 are secured and provided with a central 0 ening 9 and recesses 10 and 11. The centra opening 9 receives the projecting boss .or contactiece 7, which is in electricalconnection Wit the terminal 2, and

therefore the bottom of the insulator 8 entirely surrounds the inner end of the contactpiece 7, adjacent to thexterminal 2, and I usually provide the bottom with an inwardlyprojecting annular flange 14, surrounding the central opening, the pur )OS& of which will be presently described. Th continuation of the openin 9, but is somewhat larger diametrically t an said opening 9 and extends laterally side for receiving the terminal plate 2, this recess being of sufficient depth to permit the remaining-portiens of the bottom of the insulator to rest directiywlpon the adjacent face or of slightly greater width than the terminal 2. It now appears that the terminal 2 ektends from the central contact-piece 7 laterally through the recess 10 and beyond the one side of the insulator. The recess 11 is formed 1 00 Y in the side and bottom of the insulator at the side of the central opening 9 opposite to the recess 10 and is cut entirely through the bottom and. side, so as to form an opening entirely through the insulator at this receiving one end of the terminal 3. One of the objects of this insulator is to receive and inclose a metal socket 12, which is placed in theopen outer end of the insulator and fits somewhat loosely therein, with its no base resting upon the bottom of the insulator, but.at opposite sides of. the annular s e recess 10 forms a in. the lower face of the bdttom of the insulator and through one go tially the same 0 5 point for flange 14, so as to avoid electrical contact with the boss and adjacent portions or contactpiece 7, it being understood that the bot tom of the metal socket 12 is cut away at 13 to fit around the flange 14 and also for the 2, metal socket 12, and inner end of the terminal 3 are secured to the base 1, the aper- 1 tures in the arms 17 being threaded to re- 2o ceive the ends of the screws 19. I It is now apparent that the arms 17 of the terminal '3 l are drawn into close electrical contact with the flanges 18, and thus electrically connect the terminal 3 to said metal socket, while the 1 2 5 terminal 2, as previously described, is electrically connected to the' contact-piece or boss 7. 1

'wire 21, having one en electrically connected to a contact-piece 22 centrally on the inner end of the p nects one end ofthe fuse -wire to the terminal 2. The other end of the fuse-wire is elec- '3 5 trically connected to an' annular metal ring riphery of the fuse-,

23, surrounding the plu 20, and which is in electrical contact wit the metal socket 12; when the fuse-plug is inoperative position, thereby electrically o connecting this endof the fuse-wire to the terminal 3, and thus completing the electrical connection between the terminals 2 and 3 through the fuse-wire.

The metal socket '12 and annular band 23 5 are preferably screw-threaded, so that the lug may be screwed into the metal socket to Bring the contact member 22 in contact with the part 7. It will be observed that the extreme width of the inner end of theterminal 3 across the arms 17 is greater than the width of the recess or cut-out 13 in the metal socket andisalso greater than the width of the opening 11, while the outer, end of said terminal is some 5 what less in width than said cut-out and opening, so that in assembling the parts it is necessary to insert the terminal 3 through the open en s of the metal socket 12 and insulator 2 when the plug 20is removed, the outer end of the terminal passing readily throu h the out-out 13 until the arms 17 en age the inner walls of the metal socket, an in like manner the outer end of the terminal 3 passes readil through the openin l1 and may then be rought to a horizonta position ug, which contacts with the contact-piece 7, and thereby electrically conat right angles with the axis of the socket, as seen in Fig. 1, so as to lie flatwise upon the adjacent face of the base 1,with the arms .17 also lying flatwise upon the flan es 18. After the terminal 3 has been place in position, as just described, the insulator, with the metal socket and terminal 3,is'placed upon the base 1 and fastened to said base by the screws 19. I

In removing the insulator it is only necessary to remove the screws 19 and the screw 4, which holds the terminal 3 in place, where upon the insulator 2, the metal socket 12, and terminal 3 ma be removed together and then the socket an terminal maybe removed from the insulator in the reverse order from that described for assemblin these parts.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination with a base of insulating material, of a cup-shape insulator rest ing on the base and provided with a central aperture in its bottom, a metal socket loosely fitted in the insulator and a pair of terminals, one of which is electrically connected to the metal socket and the other bearing on the The fuse-plug 20 is provided with a'fusej base and extending outside of the msulator and rovided with a contact piece rejecting t ough the central aperture in t e insulator and ascrew passing through the base and connecting said terminal and said contact-piece.

2. The combination with a base of insulating material, a cup-shape insulator having too its bottom resting upon the base and provided with a central aperture and an annular flange surrounding said a erture, an electric contact-piece secured to tlie base and pro- 'ecting through said aperture, a metal socket loosel fitted in the insulator and removable there om, and a terminal in electrical contact with the socket and secured to the base said terminal having forked ends fitting around said flange.

3-. A cup-shape insulator having an end wall or bottom rovided with a central opening surrounded y an annular flange in combination with a metal socket having bottom flanges resting upon the bottom of the insulator at opposite sides of the flange.

. 4. An insulator for receiving metal sockets for fuse-plugs and similar devices, said insulator consist' of a cylindrical shell of insulating materia having an end wall provided with a central opening, and a recess 11). its end a face extendin laterally from the o through the si e of the shell, said bottom being also provided with an annular flange surrounding the opening.

through and with a recess in one 0 its end faces extending laterally through one side 05 I30 consisting of a cylindrical she lof insulating the shell, and hav ng an annular flange surrounding the central opening, in combination witha socket loosely fitted-in the insulator,

' and formed with bottom flanges, a'terminal having abifurcated end embracingsaid flange of the insulator and resting on the flanges of the socket, a second terminal extending under the insulator, a base on which the insulator is mounted, a screw extendin through said base and through said secomf terminal and a contact-block arranged in the central opening of the insulator, said ,screwtscr e'win'g into sa d contact-block, substantially as dey scribed.

6. An insulator for the p ose deserih'ed, 7

" material having a transverse 'fwal'l provided with acentral opening therethrjough and with a recess in one of its endfacesextending laterally through one side of the shell, said shell 'eing also provided\ wit h"an ad 'tional 0 ening at one side of they central 0 ening an ex- ING oN B; oRoUsE. 

